Malicious PDF — malware analysis report

Static analysis result for SHA-256 53fa0b3708513847…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 08:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a2ac79c30ef7977b5dac3b8e4b0d2936 SHA-1: 32242fc388a1d1e909e287c710f04b2748d4aef0 SHA-256: 53fa0b3708513847037c6df30c231a9296924e231d017b7f445a47c6fafda46a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The embedded JavaScript likely facilitates the redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3499

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b03104542cd88d4cc8a671deb9f30af8/rewunubajozazogufamawo.pdf In PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/tajitawawekoguf.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202108251941552284.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c35a3563ad1---giginezugofewesifavuzuta.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b2b11cc98---29758938839.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/6b69ch74d267tlfje5uue99nl0/fowufixawotagoso.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/xafikajilokonozalekati.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/68600851432.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c390feb6c08---goxil.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612c102a9c6a3---xomenojuwenapupapim.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051419301240.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/stigsa4ukkgsok2gj2v7of8ol5/32168934462.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/9731811747.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9b2c67031---73349865012.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/pufufusux.pdfIn PDF document text
    • http://gilleyfamilyreunion.com/clients/6/6c/6ce887ac6ce8bbcacf46524318b1f362/File/dokowavi.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/zuxetedirijuj.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/6352621f5977692b4132e6fbb59f09f4/27310736229.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/lipozagoviwug.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/givp1eddn7h4hc0e6cjofitded/bedibufimob.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/38899723072.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/22307058777.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/razokeji.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/23271219051.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=ashraful+insha+3+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001041d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C34 10704 bytes
SHA-256: cdd2ae707154b19c766d72b3c27502d76ffec3fd784cace868e24b8521424a35